Malicious Office (OOXML) / .XLSM — malware analysis report

Static analysis result for SHA-256 434927ef3e917567…

MALICIOUS

Office (OOXML) / .XLSM

136.7 KB
MD5: fef3697edb0c6545cf68e5aa8b365337 SHA-1: 3d89ea92179fbd648202cc1980c9ba105b758110 SHA-256: 434927ef3e9175676c4f5ad7b9513371e0725c573bed1868a27eb6d4b2f9ddc2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The sample is an XLSM file containing VBA macros. The document body reveals a PowerShell command designed to download an executable from 'sparepartiran.com' and execute it. This indicates a downloader functionality, aiming to fetch and run a secondary payload. The ClamAV detection further supports its malicious nature.

Heuristics 6

  • ClamAV: Xls.Malware.Sagent-10035294-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Malware.Sagent-10035294-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://sparepartiran.com/js/2Q/FOT-39602.exe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
978ebbb1ea591f5800a45de598a09b73b17c93a50419015c36352a268167a468		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1700 bytes
vbaProject_00.bin
e8e5c9169d4a5fd597d64aaed37ec35882157aead96d29b96aa584863a912e7c		 vba-project OOXML VBA project: xl/vbaProject.bin 5120 bytes
Detection
ClamAV: Xls.Malware.Sagent-10035294-0
Obfuscation or payload: unlikely

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